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<div class="title">opennurbs_base64.h</div>  </div>
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<div class="contents">
<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/* $NoKeywords: $ */</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment">/*</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment">// Copyright (c) 1993-2012 Robert McNeel &amp; Associates. All rights reserved.</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment">// OpenNURBS, Rhinoceros, and Rhino3D are registered trademarks of Robert</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment">// McNeel &amp; Associates.</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment">// THIS SOFTWARE IS PROVIDED &quot;AS IS&quot; WITHOUT EXPRESS OR IMPLIED WARRANTY.</span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment">// ALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE AND OF</span></div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment">// MERCHANTABILITY ARE HEREBY DISCLAIMED.</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="comment">//              </span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment">// For complete openNURBS copyright information see &lt;http://www.opennurbs.org&gt;.</span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="comment">*/</span></div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160; </div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="preprocessor">#if !defined(OPENNURBS_BASE64_INC_)</span></div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="preprocessor">#define OPENNURBS_BASE64_INC_</span></div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160; </div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160; </div>
<div class="line"><a name="l00022"></a><span class="lineno"><a class="line" href="class_o_n___base64_encode_stream.html">   22</a></span>&#160;<span class="keyword">class </span>ON_CLASS <a class="code" href="class_o_n___base64_encode_stream.html">ON_Base64EncodeStream</a></div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;{</div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="keyword">public</span>:</div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;  <a class="code" href="class_o_n___base64_encode_stream.html">ON_Base64EncodeStream</a>();</div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;  <span class="keyword">virtual</span> ~<a class="code" href="class_o_n___base64_encode_stream.html">ON_Base64EncodeStream</a>();</div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160; </div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="comment">    ON_Base64EncodeStream delivers the base64 encoded stream by</span></div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="comment">    calling a base64 encoded stream output handler function. </span></div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="comment">    There are two options for specifying the base64 encoded stream</span></div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;<span class="comment">    output handler function.</span></div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;<span class="comment">      1. Overriding the virtual Out() function.</span></div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;<span class="comment">      2. Providing a callback function.</span></div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;<span class="comment">    SetCallback() is used to specify a callback function to handle</span></div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;<span class="comment">    the base64 encoded stream and to specify a context pointer to be </span></div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;<span class="comment">    passed to either option of the handler.</span></div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;<span class="comment">    callback_function - [in]</span></div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;<span class="comment">      Function to handle sections of the base64 encoded stream.</span></div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;<span class="comment">      If callback_function is null, then the virtual Out() </span></div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;<span class="comment">      function will be called. When callback_function </span></div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;<span class="comment">      is specified, it must return true if the base64 encoding </span></div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;<span class="comment">      calculation should continue and false to cancel the </span></div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;<span class="comment">      base64 encoding calculation.</span></div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;<span class="comment">    callback_context - [in]</span></div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;<span class="comment">      This value is passed as the first argument when calling </span></div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;<span class="comment">      callback_function or the virutal Out() function.</span></div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;<span class="comment">    True if successful.</span></div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;<span class="comment">  Remarks:</span></div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;<span class="comment">    Once base64 encoding has started, it would be unusual to</span></div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;<span class="comment">    intentionally change the base64 encoded stream output handler,</span></div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;<span class="comment">    but you can do this if you need to.    </span></div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;  <span class="keywordtype">bool</span> SetCallback( </div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;    ON_StreamCallbackFunction callback_function,</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;    <span class="keywordtype">void</span>* callback_context</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;    );</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160; </div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;<span class="comment">    Current value of the callback function for handling</span></div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;<span class="comment">    the base64 encoded stream.  If the callback function is</span></div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;<span class="comment">    null, the the virtual Out() function is used to</span></div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;<span class="comment">    handle the output stream.</span></div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;  ON_StreamCallbackFunction CallbackFunction() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160; </div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;<span class="comment">    Current value of the context pointer passed as the first</span></div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;<span class="comment">    argument to the base64 encoded stream output handler function.</span></div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;  <span class="keywordtype">void</span>* CallbackContext() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;  </div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;<span class="comment">    Call Begin() one time to initialize the base64 encoding</span></div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;<span class="comment">    calculation.  Then call In() one or more times </span></div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;<span class="comment">    to submit the unencoded stream to the base64 encoding</span></div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;<span class="comment">    calculation. When you reach the end of the unencoded</span></div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;<span class="comment">    stream, call End().</span></div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;<span class="comment">    true if successful, false if an error occured.</span></div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;  <span class="keywordtype">bool</span> Begin();</div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160; </div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160; </div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;<span class="comment">    Call In() one or more times to base64 encode a stream of bytes.</span></div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;<span class="comment">    After the last call to In(), call End().  Calling In() will</span></div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;<span class="comment">    result in at least in_buffer_size/57 and at most </span></div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;<span class="comment">    (in_buffer_size+56)/57 calls to to the output stream handler.</span></div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;<span class="comment">    in_buffer_size - [in]</span></div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;<span class="comment">      number of bytes in in_buffer</span></div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;<span class="comment">    in_buffer - [in]</span></div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;<span class="comment">    true if successful, false if an error occured.</span></div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;  <span class="keywordtype">bool</span> In(</div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;    ON__UINT64 in_buffer_size,</div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">void</span>* in_buffer</div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;    );</div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160; </div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;<span class="comment">    If an explicit base 64 encoded stream output handler is not</span></div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;<span class="comment">    specified ( CallbackFunction() returns null ), then the </span></div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;<span class="comment">    virtual Out() function is called to handle the base 64 encoded</span></div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;<span class="comment">    output stream.  As the input stream is encoded, one or more</span></div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;<span class="comment">    calls to Out() will occur.</span></div>
<div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;<span class="comment">    With a possible exception of the last call to Out(), when Out()</span></div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;<span class="comment">    is called, 57 input bytes have been encoded into 76 output </span></div>
<div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;<span class="comment">    characters with ASCII codes A-Z, a-z, 0-9, +, /.</span></div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;<span class="comment">  Parameters:</span></div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;<span class="comment">    callback_context - [in]</span></div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;<span class="comment">      context pointer set by calling SetCallback().  Typically</span></div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;<span class="comment">      the context pointer is not used by a virtual override</span></div>
<div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;<span class="comment">      because the context can be added as member variables</span></div>
<div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;<span class="comment">      of the derived class, but it is available if needed.</span></div>
<div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;<span class="comment">    out_buffer_size - [in]</span></div>
<div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;<span class="comment">      number of non-null characters in out_buffer.</span></div>
<div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;<span class="comment">    out_buffer - [in]</span></div>
<div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;<span class="comment">      A null terminated ASCII string that is a base 64 encoding.</span></div>
<div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;<span class="comment">      out_buffer[0...(out_buffer_size-1)] are ASCII characters with</span></div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;<span class="comment">      values characters with ASCII codes A-Z, a-z, 0-9, +, /</span></div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;<span class="comment">      and out_buffer[out_buffer_size] = 0.    </span></div>
<div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;<span class="comment">    True to continue base 64 encodeing and false to cancel the</span></div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;<span class="comment">    encoding calculation.</span></div>
<div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;  <span class="keyword">virtual</span> <span class="keywordtype">bool</span> Out( </div>
<div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;    <span class="keywordtype">void</span>* callback_context, </div>
<div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;    ON__UINT32 out_buffer_size, </div>
<div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">char</span>* out_buffer </div>
<div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;    );</div>
<div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160; </div>
<div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;<span class="comment">  Description:</span></div>
<div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;<span class="comment">    After the last call to In(), call End().  Calling End() may</span></div>
<div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;<span class="comment">    generate one call to the output stream handler with the value</span></div>
<div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;<span class="comment">    of out_buffer_size = 4 to 76.</span></div>
<div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;<span class="comment">    true if successful, false if an error occured.</span></div>
<div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;  <span class="keywordtype">bool</span> End();</div>
<div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;  </div>
<div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;<span class="comment">    Then the returned value is the total number bytes in the input</span></div>
<div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;<span class="comment">    stream. The size is updated every time In() is called before </span></div>
<div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;<span class="comment">    any calls are made to the output stream handler.  If the </span></div>
<div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;<span class="comment">    calculation is finished ( End() has been called ), then the</span></div>
<div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;<span class="comment">    returned value is the total number of bytes in the entire </span></div>
<div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;<span class="comment">    input stream.</span></div>
<div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;  ON__UINT64 InSize() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160; </div>
<div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;<span class="comment">    Then the returned value is the total number characters in the</span></div>
<div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;<span class="comment">    output stream. The size is incremented immediately after each</span></div>
<div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;<span class="comment">    call to the output stream handler.  If the base64 encoding</span></div>
<div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;<span class="comment">    calculation is finished ( End() has been called ), then the</span></div>
<div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;<span class="comment">    returned value is the total number of bytes in the entire </span></div>
<div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;<span class="comment">    output stream.</span></div>
<div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;  ON__UINT64 OutSize() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160; </div>
<div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;<span class="comment">    Then the returned value is the 32-bit crc of the input stream.</span></div>
<div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;<span class="comment">    The crc is updated every time In() is called before any calls</span></div>
<div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;<span class="comment">    are made to the output stream handler.  If the base64 encoding </span></div>
<div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;<span class="comment">    calculation is finished ( End() has been called ), then the</span></div>
<div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;<span class="comment">    returned value is the 32-bit crc of the entire input stream.</span></div>
<div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;  ON__UINT32 InCRC() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160; </div>
<div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;  <span class="comment">/*</span></div>
<div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;<span class="comment">  Returns:</span></div>
<div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;<span class="comment">    Then the returned value is the 32bit crc of the output stream.</span></div>
<div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;<span class="comment">    The crc is updated immediately after each call to the output</span></div>
<div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;<span class="comment">    stream handler.  If the calculation is finished ( End() has </span></div>
<div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;<span class="comment">    been called ), then the returned value is the 32-bit crc of</span></div>
<div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;<span class="comment">    the entire output stream.</span></div>
<div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;<span class="comment">  */</span></div>
<div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;  ON__UINT32 OutCRC() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;    </div>
<div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;<span class="keyword">private</span>:</div>
<div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;  ON_StreamCallbackFunction m_out_callback_function;</div>
<div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;  <span class="keywordtype">void</span>* m_out_callback_context;</div>
<div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;  ON__UINT64 m_in_size;</div>
<div class="line"><a name="l00199"></a><span class="lineno">  199</span>&#160;  ON__UINT64 m_out_size;</div>
<div class="line"><a name="l00200"></a><span class="lineno">  200</span>&#160;  ON__UINT32 m_in_crc;</div>
<div class="line"><a name="l00201"></a><span class="lineno">  201</span>&#160;  ON__UINT32 m_out_crc;</div>
<div class="line"><a name="l00202"></a><span class="lineno">  202</span>&#160;  <span class="keywordtype">void</span>* m_implementation;</div>
<div class="line"><a name="l00203"></a><span class="lineno">  203</span>&#160;  <span class="keywordtype">void</span>* m_reserved;</div>
<div class="line"><a name="l00204"></a><span class="lineno">  204</span>&#160; </div>
<div class="line"><a name="l00205"></a><span class="lineno">  205</span>&#160;  <span class="keywordtype">void</span> ErrorHandler();</div>
<div class="line"><a name="l00206"></a><span class="lineno">  206</span>&#160;  </div>
<div class="line"><a name="l00207"></a><span class="lineno">  207</span>&#160;<span class="keyword">private</span>:</div>
<div class="line"><a name="l00208"></a><span class="lineno">  208</span>&#160;  <span class="comment">// prohibit use - no implementation</span></div>
<div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;  <a class="code" href="class_o_n___base64_encode_stream.html">ON_Base64EncodeStream</a>(<span class="keyword">const</span> <a class="code" href="class_o_n___base64_encode_stream.html">ON_Base64EncodeStream</a>&amp;);</div>
<div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;  <a class="code" href="class_o_n___base64_encode_stream.html">ON_Base64EncodeStream</a>&amp; operator=(<span class="keyword">const</span> <a class="code" href="class_o_n___base64_encode_stream.html">ON_Base64EncodeStream</a>&amp;);</div>
<div class="line"><a name="l00211"></a><span class="lineno">  211</span>&#160;};</div>
<div class="line"><a name="l00212"></a><span class="lineno">  212</span>&#160; </div>
<div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160; </div>
<div class="line"><a name="l00215"></a><span class="lineno"><a class="line" href="class_o_n___decode_base64.html">  215</a></span>&#160;<span class="keyword">class </span>ON_CLASS <a class="code" href="class_o_n___decode_base64.html">ON_DecodeBase64</a></div>
<div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;{</div>
<div class="line"><a name="l00217"></a><span class="lineno">  217</span>&#160;<span class="keyword">public</span>:</div>
<div class="line"><a name="l00218"></a><span class="lineno">  218</span>&#160;  <a class="code" href="class_o_n___decode_base64.html">ON_DecodeBase64</a>();</div>
<div class="line"><a name="l00219"></a><span class="lineno">  219</span>&#160;  <span class="keyword">virtual</span> ~<a class="code" href="class_o_n___decode_base64.html">ON_DecodeBase64</a>();</div>
<div class="line"><a name="l00220"></a><span class="lineno">  220</span>&#160; </div>
<div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;  <span class="keywordtype">void</span> Begin();</div>
<div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160; </div>
<div class="line"><a name="l00223"></a><span class="lineno">  223</span>&#160;  <span class="comment">// Decode will generate zero or more callbacks to the</span></div>
<div class="line"><a name="l00224"></a><span class="lineno">  224</span>&#160;  <span class="comment">// virtual Output() function.  If the base 64 encoded information</span></div>
<div class="line"><a name="l00225"></a><span class="lineno">  225</span>&#160;  <span class="comment">// is in pieces, you can call Decode() for each piece.  For example,</span></div>
<div class="line"><a name="l00226"></a><span class="lineno">  226</span>&#160;  <span class="comment">// if your encoded information is in a text file, you might call</span></div>
<div class="line"><a name="l00227"></a><span class="lineno">  227</span>&#160;  <span class="comment">// Decode() for every line in the file.  Decode() returns 0 if</span></div>
<div class="line"><a name="l00228"></a><span class="lineno">  228</span>&#160;  <span class="comment">// there is nothing in base64str to decode or if it detects an</span></div>
<div class="line"><a name="l00229"></a><span class="lineno">  229</span>&#160;  <span class="comment">// error that prevents any further decoding.  The function Error()</span></div>
<div class="line"><a name="l00230"></a><span class="lineno">  230</span>&#160;  <span class="comment">// can be used to determine if an error occured.  Otherwise,</span></div>
<div class="line"><a name="l00231"></a><span class="lineno">  231</span>&#160;  <span class="comment">// Decode() returns a pointer to the location in the string where</span></div>
<div class="line"><a name="l00232"></a><span class="lineno">  232</span>&#160;  <span class="comment">// it stopped decoding because it detected a character, like a null</span></div>
<div class="line"><a name="l00233"></a><span class="lineno">  233</span>&#160;  <span class="comment">// terminator, an end of line character, or any other character</span></div>
<div class="line"><a name="l00234"></a><span class="lineno">  234</span>&#160;  <span class="comment">// that could not be part of the base 64 encoded information.</span></div>
<div class="line"><a name="l00235"></a><span class="lineno">  235</span>&#160;  <span class="keyword">const</span> <span class="keywordtype">char</span>* Decode(<span class="keyword">const</span> <span class="keywordtype">char</span>* base64str);</div>
<div class="line"><a name="l00236"></a><span class="lineno">  236</span>&#160;  <span class="keyword">const</span> <span class="keywordtype">char</span>* Decode(<span class="keyword">const</span> <span class="keywordtype">char</span>* base64str, <span class="keywordtype">size_t</span> base64str_count);</div>
<div class="line"><a name="l00237"></a><span class="lineno">  237</span>&#160;  <span class="keyword">const</span> <span class="keywordtype">wchar_t</span>* Decode(<span class="keyword">const</span> <span class="keywordtype">wchar_t</span>* base64str);</div>
<div class="line"><a name="l00238"></a><span class="lineno">  238</span>&#160;  <span class="keyword">const</span> <span class="keywordtype">wchar_t</span>* Decode(<span class="keyword">const</span> <span class="keywordtype">wchar_t</span>* base64str, <span class="keywordtype">size_t</span> base64str_count);</div>
<div class="line"><a name="l00239"></a><span class="lineno">  239</span>&#160; </div>
<div class="line"><a name="l00240"></a><span class="lineno">  240</span>&#160;  <span class="comment">// You must call End() when Decode() returns 0 or when you have</span></div>
<div class="line"><a name="l00241"></a><span class="lineno">  241</span>&#160;  <span class="comment">// reached the end of your encoded information.  End() may</span></div>
<div class="line"><a name="l00242"></a><span class="lineno">  242</span>&#160;  <span class="comment">// callback to Output() zero or one time.  If all the information</span></div>
<div class="line"><a name="l00243"></a><span class="lineno">  243</span>&#160;  <span class="comment">// passed to Decode() was successfully decoded, then End()</span></div>
<div class="line"><a name="l00244"></a><span class="lineno">  244</span>&#160;  <span class="comment">// returns true.  If something was not decoded, then End()</span></div>
<div class="line"><a name="l00245"></a><span class="lineno">  245</span>&#160;  <span class="comment">// returns false.</span></div>
<div class="line"><a name="l00246"></a><span class="lineno">  246</span>&#160;  <span class="keywordtype">bool</span> End();</div>
<div class="line"><a name="l00247"></a><span class="lineno">  247</span>&#160; </div>
<div class="line"><a name="l00248"></a><span class="lineno">  248</span>&#160;  <span class="comment">// Override the virtual Output() callback function to process the </span></div>
<div class="line"><a name="l00249"></a><span class="lineno">  249</span>&#160;  <span class="comment">// decoded output.  Each time Output() is called there are m_output_count</span></div>
<div class="line"><a name="l00250"></a><span class="lineno">  250</span>&#160;  <span class="comment">// bytes in the m_output[] array.</span></div>
<div class="line"><a name="l00251"></a><span class="lineno">  251</span>&#160;  <span class="comment">// Every call to Decode() can result in zero, one, or many callbacks</span></div>
<div class="line"><a name="l00252"></a><span class="lineno">  252</span>&#160;  <span class="comment">// to Output().  Calling End() may result in zero or one callbacks</span></div>
<div class="line"><a name="l00253"></a><span class="lineno">  253</span>&#160;  <span class="comment">// to Output().</span></div>
<div class="line"><a name="l00254"></a><span class="lineno">  254</span>&#160;  <span class="keyword">virtual</span> <span class="keywordtype">void</span> Output();</div>
<div class="line"><a name="l00255"></a><span class="lineno">  255</span>&#160; </div>
<div class="line"><a name="l00256"></a><span class="lineno">  256</span>&#160;  <span class="comment">// m_decode_count = total number of input base64 characters</span></div>
<div class="line"><a name="l00257"></a><span class="lineno">  257</span>&#160;  <span class="comment">// that Decode() has decoded.</span></div>
<div class="line"><a name="l00258"></a><span class="lineno">  258</span>&#160;  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> m_decode_count; </div>
<div class="line"><a name="l00259"></a><span class="lineno">  259</span>&#160; </div>
<div class="line"><a name="l00260"></a><span class="lineno">  260</span>&#160;  <span class="keywordtype">int</span>  m_output_count; <span class="comment">// 0 to 512</span></div>
<div class="line"><a name="l00261"></a><span class="lineno">  261</span>&#160;  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> m_output[512];</div>
<div class="line"><a name="l00262"></a><span class="lineno">  262</span>&#160; </div>
<div class="line"><a name="l00263"></a><span class="lineno">  263</span>&#160;  <span class="comment">// Call if your Output() function detects an error and</span></div>
<div class="line"><a name="l00264"></a><span class="lineno">  264</span>&#160;  <span class="comment">// wants to stop further decoding.</span></div>
<div class="line"><a name="l00265"></a><span class="lineno">  265</span>&#160;  <span class="keywordtype">void</span> SetError();</div>
<div class="line"><a name="l00266"></a><span class="lineno">  266</span>&#160; </div>
<div class="line"><a name="l00267"></a><span class="lineno">  267</span>&#160;  <span class="comment">// Returns true if an error occured during decoding because</span></div>
<div class="line"><a name="l00268"></a><span class="lineno">  268</span>&#160;  <span class="comment">// invalid input was passed to Decode().</span></div>
<div class="line"><a name="l00269"></a><span class="lineno">  269</span>&#160;  <span class="keyword">const</span> <span class="keywordtype">bool</span> Error() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00270"></a><span class="lineno">  270</span>&#160; </div>
<div class="line"><a name="l00271"></a><span class="lineno">  271</span>&#160;<span class="keyword">private</span>:</div>
<div class="line"><a name="l00272"></a><span class="lineno">  272</span>&#160;  <span class="keywordtype">int</span> m_status; <span class="comment">// 1: error - decoding stopped</span></div>
<div class="line"><a name="l00273"></a><span class="lineno">  273</span>&#160;                <span class="comment">// 2: &#39;=&#39; encountered as 3rd char in Decode()</span></div>
<div class="line"><a name="l00274"></a><span class="lineno">  274</span>&#160;                <span class="comment">// 3: successfully parsed &quot;**==&quot;</span></div>
<div class="line"><a name="l00275"></a><span class="lineno">  275</span>&#160;                <span class="comment">// 4: successfully parsed &quot;***=&quot;</span></div>
<div class="line"><a name="l00276"></a><span class="lineno">  276</span>&#160;                <span class="comment">// 5: End() successfully called.</span></div>
<div class="line"><a name="l00277"></a><span class="lineno">  277</span>&#160; </div>
<div class="line"><a name="l00278"></a><span class="lineno">  278</span>&#160;  <span class="comment">// cached encoded input from previous call to Decode() </span></div>
<div class="line"><a name="l00279"></a><span class="lineno">  279</span>&#160;  <span class="keywordtype">int</span> m_cache_count;</div>
<div class="line"><a name="l00280"></a><span class="lineno">  280</span>&#160;  <span class="keywordtype">int</span> m_cache[4];</div>
<div class="line"><a name="l00281"></a><span class="lineno">  281</span>&#160; </div>
<div class="line"><a name="l00282"></a><span class="lineno">  282</span>&#160;  <span class="keywordtype">void</span> DecodeHelper1(); <span class="comment">// decodes &quot;**==&quot; quartet into 1 byte</span></div>
<div class="line"><a name="l00283"></a><span class="lineno">  283</span>&#160;  <span class="keywordtype">void</span> DecodeHelper2(); <span class="comment">// decodes &quot;***=&quot; quartet into 2 bytes</span></div>
<div class="line"><a name="l00284"></a><span class="lineno">  284</span>&#160;};</div>
<div class="line"><a name="l00285"></a><span class="lineno">  285</span>&#160; </div>
<div class="line"><a name="l00286"></a><span class="lineno">  286</span>&#160; </div>
<div class="line"><a name="l00288"></a><span class="lineno">  288</span>&#160; </div>
<div class="line"><a name="l00289"></a><span class="lineno">  289</span>&#160; </div>
<div class="line"><a name="l00290"></a><span class="lineno">  290</span>&#160;<span class="comment">/*</span></div>
<div class="line"><a name="l00291"></a><span class="lineno">  291</span>&#160;<span class="comment">class ON_CLASS ON_EncodeBase64</span></div>
<div class="line"><a name="l00292"></a><span class="lineno">  292</span>&#160;<span class="comment">{</span></div>
<div class="line"><a name="l00293"></a><span class="lineno">  293</span>&#160;<span class="comment">public:</span></div>
<div class="line"><a name="l00294"></a><span class="lineno">  294</span>&#160;<span class="comment">  ON_EncodeBase64();</span></div>
<div class="line"><a name="l00295"></a><span class="lineno">  295</span>&#160;<span class="comment">  virtual ~ON_EncodeBase64();</span></div>
<div class="line"><a name="l00296"></a><span class="lineno">  296</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l00297"></a><span class="lineno">  297</span>&#160;<span class="comment">  void Begin();</span></div>
<div class="line"><a name="l00298"></a><span class="lineno">  298</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l00299"></a><span class="lineno">  299</span>&#160;<span class="comment">  // Calling Encode will generate at least</span></div>
<div class="line"><a name="l00300"></a><span class="lineno">  300</span>&#160;<span class="comment">  // sizeof_buffer/57 and at most (sizeof_buffer+56)/57</span></div>
<div class="line"><a name="l00301"></a><span class="lineno">  301</span>&#160;<span class="comment">  // calls to Output().  Every callback to Output() will</span></div>
<div class="line"><a name="l00302"></a><span class="lineno">  302</span>&#160;<span class="comment">  // have m_output_count = 76.</span></div>
<div class="line"><a name="l00303"></a><span class="lineno">  303</span>&#160;<span class="comment">  void Encode(const void* buffer, size_t sizeof_buffer);</span></div>
<div class="line"><a name="l00304"></a><span class="lineno">  304</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l00305"></a><span class="lineno">  305</span>&#160;<span class="comment">  // Calling End may generate a single call to Output()</span></div>
<div class="line"><a name="l00306"></a><span class="lineno">  306</span>&#160;<span class="comment">  // If it does generate a single call to Output(),</span></div>
<div class="line"><a name="l00307"></a><span class="lineno">  307</span>&#160;<span class="comment">  // then m_output_count will be between 1 and 76.</span></div>
<div class="line"><a name="l00308"></a><span class="lineno">  308</span>&#160;<span class="comment">  void End(); // may generate a single call to Output().</span></div>
<div class="line"><a name="l00309"></a><span class="lineno">  309</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l00310"></a><span class="lineno">  310</span>&#160;<span class="comment">  // With a single exception, when Output() is called,</span></div>
<div class="line"><a name="l00311"></a><span class="lineno">  311</span>&#160;<span class="comment">  // 57 input bytes have been encoded into 76 output</span></div>
<div class="line"><a name="l00312"></a><span class="lineno">  312</span>&#160;<span class="comment">  // characters with ASCII codes A-Z, a-z, 0-9, +, /.</span></div>
<div class="line"><a name="l00313"></a><span class="lineno">  313</span>&#160;<span class="comment">  // m_output_count will be 76</span></div>
<div class="line"><a name="l00314"></a><span class="lineno">  314</span>&#160;<span class="comment">  // m_output[0...(m_output_count-1)] will be the base 64</span></div>
<div class="line"><a name="l00315"></a><span class="lineno">  315</span>&#160;<span class="comment">  // encoding.</span></div>
<div class="line"><a name="l00316"></a><span class="lineno">  316</span>&#160;<span class="comment">  // m_output[m_output_count] = 0.</span></div>
<div class="line"><a name="l00317"></a><span class="lineno">  317</span>&#160;<span class="comment">  // The Output() function can modify the values of m_output[]</span></div>
<div class="line"><a name="l00318"></a><span class="lineno">  318</span>&#160;<span class="comment">  // and m_output_count anyway it wants.</span></div>
<div class="line"><a name="l00319"></a><span class="lineno">  319</span>&#160;<span class="comment">  virtual void Output();</span></div>
<div class="line"><a name="l00320"></a><span class="lineno">  320</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l00321"></a><span class="lineno">  321</span>&#160;<span class="comment">  // Total number of bytes passed to Encode().</span></div>
<div class="line"><a name="l00322"></a><span class="lineno">  322</span>&#160;<span class="comment">  int m_encode_count;</span></div>
<div class="line"><a name="l00323"></a><span class="lineno">  323</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l00324"></a><span class="lineno">  324</span>&#160;<span class="comment">  // When the virtual Output() is called, there are m_output_count (1 to 76)</span></div>
<div class="line"><a name="l00325"></a><span class="lineno">  325</span>&#160;<span class="comment">  // characters of base64 encoded output in m_output[].  The remainder of </span></div>
<div class="line"><a name="l00326"></a><span class="lineno">  326</span>&#160;<span class="comment">  // the m_output[] array is zero.  The Output function may modify the</span></div>
<div class="line"><a name="l00327"></a><span class="lineno">  327</span>&#160;<span class="comment">  // contents of m_output[] any way it sees fit.</span></div>
<div class="line"><a name="l00328"></a><span class="lineno">  328</span>&#160;<span class="comment">  int  m_output_count;</span></div>
<div class="line"><a name="l00329"></a><span class="lineno">  329</span>&#160;<span class="comment">  char m_output[80];</span></div>
<div class="line"><a name="l00330"></a><span class="lineno">  330</span>&#160;<span class="comment">  </span></div>
<div class="line"><a name="l00331"></a><span class="lineno">  331</span>&#160;<span class="comment">private:</span></div>
<div class="line"><a name="l00332"></a><span class="lineno">  332</span>&#160;<span class="comment">  // input waiting to be encoded</span></div>
<div class="line"><a name="l00333"></a><span class="lineno">  333</span>&#160;<span class="comment">  // At most 56 bytes can be waiting to be processed in m_input[].</span></div>
<div class="line"><a name="l00334"></a><span class="lineno">  334</span>&#160;<span class="comment">  unsigned int  m_unused2; // Here for alignment purposes. Never used by opennurbs.</span></div>
<div class="line"><a name="l00335"></a><span class="lineno">  335</span>&#160;<span class="comment">  unsigned int  m_input_count;</span></div>
<div class="line"><a name="l00336"></a><span class="lineno">  336</span>&#160;<span class="comment">  unsigned char m_input[64];</span></div>
<div class="line"><a name="l00337"></a><span class="lineno">  337</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l00338"></a><span class="lineno">  338</span>&#160;<span class="comment">  void EncodeHelper1(const unsigned char*, char*);</span></div>
<div class="line"><a name="l00339"></a><span class="lineno">  339</span>&#160;<span class="comment">  void EncodeHelper2(const unsigned char*, char*);</span></div>
<div class="line"><a name="l00340"></a><span class="lineno">  340</span>&#160;<span class="comment">  void EncodeHelper3(const unsigned char*, char*);</span></div>
<div class="line"><a name="l00341"></a><span class="lineno">  341</span>&#160;<span class="comment">  void EncodeHelper57(const unsigned char*);</span></div>
<div class="line"><a name="l00342"></a><span class="lineno">  342</span>&#160;<span class="comment">};</span></div>
<div class="line"><a name="l00343"></a><span class="lineno">  343</span>&#160;<span class="comment">*/</span></div>
<div class="line"><a name="l00344"></a><span class="lineno">  344</span>&#160; </div>
<div class="line"><a name="l00345"></a><span class="lineno">  345</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="ttc" id="aclass_o_n___base64_encode_stream_html"><div class="ttname"><a href="class_o_n___base64_encode_stream.html">ON_Base64EncodeStream</a></div><div class="ttdef"><b>Definition:</b> opennurbs_base64.h:23</div></div>
<div class="ttc" id="aclass_o_n___decode_base64_html"><div class="ttname"><a href="class_o_n___decode_base64.html">ON_DecodeBase64</a></div><div class="ttdef"><b>Definition:</b> opennurbs_base64.h:216</div></div>
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